AMS 2300 Hard drive failure

I'm new to the AMS systems and we have some drives in our expansion units that have been wiped. They are now red lighting, can the expansion no longer read these drives? I am under the impression that there is something located on the drive so that the AMS system can recognise it. I cannot seem to make the system recognise them as in the navigator Modular 2 they are showing as detached.